Unix Timestamp Converter
Convert Unix epoch timestamps to human-readable UTC and local datetimes — and convert datetime-local values back to Unix seconds. Supports auto-detection of seconds vs milliseconds for log and API debugging.
Runs entirely in your browser. Your data never leaves this device.
- Unix ↔ datetime
- Seconds or ms
- UTC + local
- ISO copy
- Now button
How it works
- Paste a Unix timestamp (seconds or milliseconds) or pick a date/time.
- Convert both ways and view UTC plus your local timezone.
- Copy ISO, locale, or epoch values for APIs and logs.
Key features
- Unix ↔ datetime
- Seconds or ms
- UTC + local
- ISO copy
- Now button
FAQ
Seconds or milliseconds?
Values ≥ 1e12 are treated as milliseconds; smaller values as seconds. You can override the unit.
Timezone?
We show UTC and your browser’s local zone from the device clock.
Leap seconds?
Unix time ignores leap seconds; this matches typical JS Date behavior.
Private?
Yes — no network requests.
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